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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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GitHub Copilot
B
Cline
A
Claude Code
S
Grammarly
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Open-source VS Code agent. Reads + writes + runs.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Grammar check + tone + AI drafting, everywhere you type.
Categorycodingcodingcodingwriting
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree (open source) + your API costsPart of Claude Pro/Max/Team plansFree + $12-$15/mo Premium + team plans
Best forTeams with GitHub already. Devs who don't want to change IDEs.VS Code users who want agentic coding without changing IDEs.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Non-native English writers, business email, anyone who types a lot.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. Best free agentic option in VS Code. Use with Claude for best results.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.
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